1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_SENSOR_SERVICE_H 18 #define ANDROID_SENSOR_SERVICE_H 19 20 #include <stdint.h> 21 #include <sys/types.h> 22 23 #include <utils/Vector.h> 24 #include <utils/SortedVector.h> 25 #include <utils/KeyedVector.h> 26 #include <utils/threads.h> 27 #include <utils/RefBase.h> 28 29 #include <binder/BinderService.h> 30 31 #include <gui/Sensor.h> 32 #include <gui/SensorChannel.h> 33 #include <gui/ISensorServer.h> 34 #include <gui/ISensorEventConnection.h> 35 36 #include "SensorInterface.h" 37 38 // --------------------------------------------------------------------------- 39 40 #define DEBUG_CONNECTIONS false 41 42 struct sensors_poll_device_t; 43 struct sensors_module_t; 44 45 namespace android { 46 // --------------------------------------------------------------------------- 47 48 class SensorService : 49 public BinderService<SensorService>, 50 public BnSensorServer, 51 protected Thread 52 { 53 friend class BinderService<SensorService>; 54 55 static const nsecs_t MINIMUM_EVENTS_PERIOD = 1000000; // 1000 Hz 56 57 SensorService(); 58 virtual ~SensorService(); 59 60 virtual void onFirstRef(); 61 62 // Thread interface 63 virtual bool threadLoop(); 64 65 // ISensorServer interface 66 virtual Vector<Sensor> getSensorList(); 67 virtual sp<ISensorEventConnection> createSensorEventConnection(); 68 virtual status_t dump(int fd, const Vector<String16>& args); 69 70 71 class SensorEventConnection : public BnSensorEventConnection { 72 virtual ~SensorEventConnection(); 73 virtual void onFirstRef(); 74 virtual sp<SensorChannel> getSensorChannel() const; 75 virtual status_t enableDisable(int handle, bool enabled); 76 virtual status_t setEventRate(int handle, nsecs_t ns); 77 78 sp<SensorService> const mService; 79 sp<SensorChannel> const mChannel; 80 mutable Mutex mConnectionLock; 81 82 // protected by SensorService::mLock 83 SortedVector<int> mSensorInfo; 84 85 public: 86 SensorEventConnection(const sp<SensorService>& service); 87 88 status_t sendEvents(sensors_event_t const* buffer, size_t count, 89 sensors_event_t* scratch = NULL); 90 bool hasSensor(int32_t handle) const; 91 bool hasAnySensor() const; 92 bool addSensor(int32_t handle); 93 bool removeSensor(int32_t handle); 94 }; 95 96 class SensorRecord { 97 SortedVector< wp<SensorEventConnection> > mConnections; 98 public: 99 SensorRecord(const sp<SensorEventConnection>& connection); 100 bool addConnection(const sp<SensorEventConnection>& connection); 101 bool removeConnection(const wp<SensorEventConnection>& connection); getNumConnections()102 size_t getNumConnections() const { return mConnections.size(); } 103 }; 104 105 SortedVector< wp<SensorEventConnection> > getActiveConnections() const; 106 DefaultKeyedVector<int, SensorInterface*> getActiveVirtualSensors() const; 107 108 String8 getSensorName(int handle) const; 109 void recordLastValue(sensors_event_t const * buffer, size_t count); 110 static void sortEventBuffer(sensors_event_t* buffer, size_t count); 111 void registerSensor(SensorInterface* sensor); 112 void registerVirtualSensor(SensorInterface* sensor); 113 114 // constants 115 Vector<Sensor> mSensorList; 116 Vector<Sensor> mUserSensorList; 117 DefaultKeyedVector<int, SensorInterface*> mSensorMap; 118 Vector<SensorInterface *> mVirtualSensorList; 119 status_t mInitCheck; 120 121 // protected by mLock 122 mutable Mutex mLock; 123 DefaultKeyedVector<int, SensorRecord*> mActiveSensors; 124 DefaultKeyedVector<int, SensorInterface*> mActiveVirtualSensors; 125 SortedVector< wp<SensorEventConnection> > mActiveConnections; 126 127 // The size of this vector is constant, only the items are mutable 128 KeyedVector<int32_t, sensors_event_t> mLastEventSeen; 129 130 public: getServiceName()131 static char const* getServiceName() { return "sensorservice"; } 132 133 void cleanupConnection(SensorEventConnection* connection); 134 status_t enable(const sp<SensorEventConnection>& connection, int handle); 135 status_t disable(const sp<SensorEventConnection>& connection, int handle); 136 status_t setEventRate(const sp<SensorEventConnection>& connection, int handle, nsecs_t ns); 137 }; 138 139 // --------------------------------------------------------------------------- 140 }; // namespace android 141 142 #endif // ANDROID_SENSOR_SERVICE_H 143